package com.cat.interceptor;

import java.io.IOException;

import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;

public class FilterEncoding implements Filter {  
  protected String encoding; // 接收字符编码  
  protected FilterConfig filterConfig; // 初始化配置  
  public void init(FilterConfig filterConfig) throws ServletException {  
      // 从web.xml文件中读取encoding的值  
      encoding = filterConfig.getInitParameter("encoding");  
  }  
  // doFilter方法  
  public void doFilter(ServletRequest request, ServletResponse response,  
          FilterChain chain) throws IOException, ServletException {  
      request.setCharacterEncoding(encoding);  
      chain.doFilter(request, response);  
  }  
  public void destroy() {  

  }  
}  